CVE-2026-63237: Vulnerability in Three Learning Koollab LMS
CVE-2026-63237 is a medium severity vulnerability in Three Learning's Koollab LMS version 5.3.2. It involves a bypass of the TOTP two-factor authentication mechanism by allowing an attacker to supply a client-controlled seed, which generates a matching one-time password and bypasses the second authentication factor. This could potentially enable unauthorized access to administrator accounts.
AI Analysis
Technical Summary
This vulnerability in Koollab LMS version 5.3.2 allows an attacker to bypass the TOTP-based two-factor authentication by supplying a client-controlled seed. This seed is used to generate a valid one-time password, effectively circumventing the second factor of authentication and potentially granting unauthorized access to administrator accounts. The CVSS 3.1 base score is 4.8 (medium), reflecting network attack vector, high attack complexity, no privileges required, no user interaction, and limited confidentiality and integrity impact.
Potential Impact
An attacker exploiting this vulnerability could bypass the second factor of authentication, potentially gaining unauthorized access to administrator accounts. This could lead to limited confidentiality and integrity impacts within the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been published at this time.
CVE-2026-63237: Vulnerability in Three Learning Koollab LMS
Description
CVE-2026-63237 is a medium severity vulnerability in Three Learning's Koollab LMS version 5.3.2. It involves a bypass of the TOTP two-factor authentication mechanism by allowing an attacker to supply a client-controlled seed, which generates a matching one-time password and bypasses the second authentication factor. This could potentially enable unauthorized access to administrator accounts.
CVSS v3.1
Score 4.8medium
Affected software
Three Learning
Koollab LMS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Koollab LMS version 5.3.2 allows an attacker to bypass the TOTP-based two-factor authentication by supplying a client-controlled seed. This seed is used to generate a valid one-time password, effectively circumventing the second factor of authentication and potentially granting unauthorized access to administrator accounts. The CVSS 3.1 base score is 4.8 (medium), reflecting network attack vector, high attack complexity, no privileges required, no user interaction, and limited confidentiality and integrity impact.
Potential Impact
An attacker exploiting this vulnerability could bypass the second factor of authentication, potentially gaining unauthorized access to administrator accounts. This could lead to limited confidentiality and integrity impacts within the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been published at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CSA
- Date Reserved
- 2026-07-16T02:35:54.249Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a699fbb9c2644c7f814eb60
Added to database: 07/29/2026, 06:37:47 UTC
Last enriched: 08/05/2026, 15:05:07 UTC
Last updated: 09/10/2026, 20:00:36 UTC
Views: 60
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